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      1 /*	$NetBSD: _setjmp.S,v 1.7 2011/04/30 19:43:17 martin Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This software was developed by the Computer Systems Engineering group
      8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
      9  * contributed to Berkeley.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  * from: Header: _setjmp.s,v 1.1 91/07/06 16:45:53 torek Exp
     36  */
     37 
     38 #include <machine/asm.h>
     39 #if defined(LIBC_SCCS) && !defined(lint)
     40 #if 0
     41 	.asciz "@(#)_setjmp.s	8.1 (Berkeley) 6/4/93"
     42 #else
     43 	RCSID("$NetBSD: _setjmp.S,v 1.7 2011/04/30 19:43:17 martin Exp $")
     44 #endif
     45 #endif /* LIBC_SCCS and not lint */
     46 
     47 	.register %g2,#ignore
     48 	.register %g3,#ignore
     49 
     50 /*
     51  * C library -- _setjmp, _longjmp
     52  *
     53  *	_longjmp(a,v)
     54  * will generate a "return(v?v:1)" from
     55  * the last call to
     56  *	_setjmp(a)
     57  * The previous signal state is NOT restored.
     58  */
     59 
     60 ENTRY(_setjmp)
     61 	stx	%sp, [%o0+0]	/* store caller's stack pointer */
     62 	stx	%o7, [%o0+8]	/* and return pc */
     63 	stx	%g0, [%o0+0x18]	/* mark as non-sigmask jmpbuf */
     64 
     65 	/* store globals, offsets compatible with siglongjmp */
     66 	stx	%g1, [%o0+0x28]
     67 	stx	%g2, [%o0+0x30]		/* adjust asserts in longjmp.c */
     68 	stx	%g3, [%o0+0x48]		/* if you change any of these */
     69 	stx	%g6, [%o0+0x50]		/* offsets! */
     70 	stx	%g7, [%o0+0x58]
     71 
     72 	retl
     73 	 clr	%o0		! return 0
     74 
     75 ENTRY(_longjmp)
     76 	save	%sp, -CC64FSZ, %sp
     77 	flushw
     78 	/*
     79 	 * We restore the saved stack pointer to %fp, then issue
     80 	 * a `restore' instruction which will reload the register
     81 	 * window from the stack.
     82 	 */
     83 	ldx	[%i0+0x28],%g1
     84 	ldx	[%i0+0x30],%g2
     85 	ldx	[%i0+0x48],%g3
     86 	ldx	[%i0+0x50],%g6
     87 	ldx	[%i0+0x58],%g7
     88 	ldx	[%i0+8], %i7
     89 	ldx	[%i0+0], %fp
     90 	mov	1, %i0
     91 	movrnz	%i1, %i1, %i0	! compute v ? v : 1
     92 	ret
     93 	 restore
     94